Friction shock-absorbing mechanism



Sept. 30 1924.

J. F. OCONNOR FRICTION SHOCK ABSORBING MECHANISM Filed May 6,

IIL

Patented Sept. 30, 1924.

PATENT CFMQE,

JOHN F. OCONNOR, F CHICAGO, ILLINOIS, ASSIGNOR, BY MIE-SNE ASSIGNMENTS, T0 W. H. MINER, INC., A CORPORATION 0F DELAWARE.

FRICTION SHOCK-ABSORBING- MECHANISM.

Application led May 6,

To all whom t may 00m-em: u

Be it known that I, JOHN F. CCoNNoR, a citizen of the United States, residing at Chicago, inthe county of Cook and State of Illinois, have invented a certain new and useful Improvement in Friction Shock- Absorbing Mechanisms, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification. t Y This invention relates to improvements in friction shock absorbing mechanisms'.

The object of the invention is to provide a friction ,shock absorbing mechanism especially adapted for railway draft riggings wherein isy obtained high capacity and the friction elements so `formed that they may be readil and cheaply cast `without. the necessity o expensive iinishing operations. y Inthe drawing forming a part of this specification, Figure 1 is a horizontal longitudinal sectional view of a portion of a railway draft rigging showing my improvements in connection therewith. Figure 2 is a vertical transverse sectional view taken substantially on the line 2f-2 of Figure 1. Figure 3 is a longitudinal central sectional view of the shock absorbing mechanism proper. And Figure 4 is a detailed elevational view of one of the combined friction shoes and sprin caps.

In said drawing,l 10-10 denote channelshaped center or draft sills of a railway car to the inner faces of which are secured front stop lugs 11 and rear stop lugs 12 arranged in the usual manner. A portion of a draw bar is lindicated at 13 to which is secured a yoke 14 of well known form. The shock absorbing mechanism proper, hereinafter described, is disposed within the yoke in the usual manner and the same is true of a front follower 15 and rear follower 16. All of the movable parts of the rigging are arranged to be supported by any suitable means such as the detachable saddle-plate 17.

The improved shock absorbing mechanism proper as shown, comprises broadly, a double-ended friction casting A; four end wedges B-B, two at each end of the mechanism; four transversely movable friction shoes C-Cg twin arranged transversely ex- 1920. Serial NO. 379,325.

tending springs D-D; and a pair of retainer bolts lil-E.

The improved friction shell, as shown, is of substantially hollov.7 box-like form having upper and lower walls 18-18 and side walls 1.9-19, the latter providing opposed longitudinally extending flat friction surfaces 20k20 on their inner sides at each end of the casting A. rlhe casting A is provided centrally thereof on the inner face of each side wall 19 with an inwardly extended wedge section 2l which forms opposed wedge surfaces 22 and 23.

The end wedges B, ,four in number, are of like construction and are arranged in pairs at each end of the mechanism, as clearly indicated in yFigure 1. Each of said wedges B is provided on its outer side with a flat friction surface 24 adapted to cooperate wth'a corresponding `opposed friction surface 2O of the casting A. Cn its inner side, each wedge B is formed with an i inclined wedging surface 25 as shown in Figure l.

The four friction shoes C are also of like construction and each is provided with a wedge surface 26 co-operating with a corresponding wedge surface 25. Each shoe C `is also provided with another wedge surface 27 at its inner end which co-operates with an opposing wedge surface'22 or 23 of the corresponding central integral wedge 21. As clearly shown in Figure l, the shoes C are recessed as indicated at 28 so as to form pockets to accommodate the ends of the coil springs D. In normal position of the parts, the shoes C are separated both transversely and longitudinally, the spacing left being made to correspond to the permissible compressive stroke of the mechanism. The retainer bolts E extend thru suitable longitudinally extending perforations 29 in the end wedges and perforations 30 in the cen-- tral fixed wedges 21. The outer sections of the shoes C are notched or recessed as indicated. at 3l in order to clear said bolts when the shoes are in their normal position.

The oper-ation is as follows: Upon relative approach of the followers in either pull or draft, the end wedges B will be forced inwardly of the casting A and this movement in turn will compel the friction shoes C to move yboth laterally and longitudinally with respect to the casting A, it being evident that the shoes C will not only slide with respect to the end wedges B but also upon the fixed central Wedges 21.

I claim:

I.In a friction shock absorbing mechanism7 the combination with a hollow integral friction shell unit having interior opposed parallel friction surfaces at each end thereof and interior fixed wedge sections at the center; of a pair of independent friction wedges at each end of the shell and co-operable with the corresponding interio-r friction surfaces of the shell; a paiil of laterally movable friction shoes in each end of the shell and co-operable with the respective end pair of friction wedges and the central fixed wedges of the shell; and spring means between the shoes to yieldingly resist relative approach thereof.

2. In a friction shock absorbing mechanism, the combination with a hollow friction shell having opposed relatively fixed walls provided with interior parallel friction surfaces at each end thereof and interior fixed wedge sections at the center; of a pair of independent friction wedges at each end 0f the shell and co-operable with the correspondinginterior friction ,surfaces ofthe shell; a pair of laterally movable friction shoes in each end of the shell and co-operable with the respective end pair of friction wedges and the central fixed wedges of the shell; spring means `between the shoes to yieldingly resist relative approach thereof; and means; for limiting the outward movement of said end friction wedges with respect to the shell.

3. In a friction shock absorbing mechanism, the combination with a hollow casting having integral opposed relatively fixed wedge sections on the interior thereof intermediate its ends., said casting'having also interior longitudinally extending friction surfaces on eachxsideof sai-d wedge sections, thereby dividing the casting into two frietion shells; of the following instrumentalities in each friction shell; a pair of friction wedges co-operable with the shell; a pair of laterally movable friction shoes co-operable with said wedges and said wedge sections, and a spring between the pair of shoes. f

4f. In a friction shock absorbing mecha-4 nism, the combination with a hollow casting having integral opposed relatively fixed wedge sections Von the interiorfthereof intermediate it sends, said'casting having also interior longitudinally extending friction surfaces on each sid'e'of said wedge sections,

thereby dividing thefcasting into two friction shells; of the following instrumentalities in each friction shell; a pair of friction wedges co-oper'able with the shell,` a pair of laterally movable friction shoes cooperable 4with said wedges and said wedge sections, and a springbetween the pair of slices; and detachable means `for hold-ing all of said instrumental'ities,in `assembled relation with the shell;

In witnessV `that I claim the foregoing I have hereunto subscribed myfname this Bthz day of Apr. 1920. y

JOHN F. QCONNOR Witnesses: 7

CARRIE GAILING, UNA C. PEKIN. y' 

